Infrared sauna · Compare
Medical Saunas Medical 4 vs Clearlight Premier IS-1
In our view the Premier is the stronger buy on evidence. Its EMF rests on a named lab, though one Clearlight hired, testing bare heater panels rather than a seat; we found no third-party report behind the Medical 4's 0.03 mG, and its full-spectrum claim has no separate near-infrared source. We score what is documented, not what is marketed.
Two cabins around $5,300 to $5,449 with very different evidence. Medical Saunas' Medical 4 ($5,449) markets heavy doctor-designed branding and a headline 0.03 mG EMF figure we could not trace to a third-party report, with a full-spectrum label resting on carbon and ceramic panels and no separate near-infrared emitter. The Clearlight Premier IS-1 ($5,299) is a far-only cabin backed by Clearlight-commissioned Vitatech tests of bare heater panels (peaks of 0.12 to 0.36 mG at 2 inches), with no seated in-cabin reading published.
| $5,449 | Price | $5,299 |
| 0.03 mG (unverified) | Verified EMF | 0.36 mG (unverified) |
| full (no NIR emitter) | Spectrum | far |
| 6 carbon + ceramic | Heaters | 6 carbon-ceramic hybrid (True Wave) + floor |
| none published | ETL/UL | listed |
| cabin (2-person) | Type | cabin (1-person) |
Score breakdown
| 0.0 | Verified EMF30% | 2.0 |
| 0.0 | Spectrum disclosure20% | 6.0 |
| 7.0 | Heat & Coverage15% | 10.0 |
| 5.0 | Value20% | 5.0 |
| 3.0 | Safety & Build15% | 9.0 |
FAQ
- Is the Medical 4's 0.03 mG figure credible?
- We could not find a third-party report or a named measurement position behind it, so we do not credit it. The Clearlight Premier's evidence is a set of commissioned Vitatech heater-panel reports, which is a documented lab result, though not a seated reading.
- Is the Medical 4 really full spectrum?
- Its full-spectrum label rests on carbon and ceramic far-infrared panels with no separate near-infrared emitter, so we cap that claim. A real full-spectrum sauna needs a distinct near-infrared source, such as named LED wavelengths or incandescent lamps.